The Diamond Antenna NR770HB Dualband VHF/UHF Mobile Antenna is resonant on the 2m and 70cm amateur bands. The NR770HB is a 1/2-wavelength design providing 3.0 dB of gain on the 2m band, and a 2 x 5/8-wavelength design providing 5.5 dB gain on the 70cm band. The NR770HB is 40" tall and weighs 200 grams. The NR770HB features fold-over ability for entry into low overhead clearance areas. Power rating is 200/200 watts. The connector type is a gold-plated UHF/PL-259. Black finish. Grounding is not required.